The split double-stage casing head is a well control device used in oil and gas wellheads, mainly used to manage the pressure difference between different casing layers at the wellhead. It consists of two independent sealing units and is usually used for drilling operations in deep or complex wells. Compared with the single-stage casing head, the split double-stage casing head can provide higher sealing and pressure control capabilities and adapt to the situation of large pressure changes in the well.
Its structure is divided into two parts: the upper casing head and the lower casing head. The upper casing head is mainly used to control the sealing of the outer casing, while the lower casing head is used to control the sealing of the inner casing. Each layer can independently withstand different well pressures and provide effective wellhead sealing to prevent well fluid leakage and gas escape.
The advantage of the split double-stage casing head is its better well control performance, which can provide more reliable protection under complex geological conditions, especially in high-pressure and high-temperature environments. It is often used in oil and gas exploration and development, especially in deepwater, ultra-deep wells or unconventional oil and gas resource exploitation.

◆ Company Profile

Our company is an enterprise integrating the design and manufacture of petroleum machinery and equipment and petrochemical pipeline valves. It is now a national high-tech enterprise, a Jiangsu Province science and technology private enterprise, and a network supplier of Sinopec, PetroChina and CNOOC.
The company mainly produces oil drilling and production equipment and accessories: oil (gas) wellhead devices, blowout preventers, mud manifolds, throttling and well killing manifolds, downhole tools, salvage tools, screw drills, expansion joints, oil and water well acidification and plugging, layered fracturing, water injection, valves, filters, thermal recovery wellhead devices, thermal expansion compensators, thermal recovery gas injection active pipelines and process pipe string design and technical services for oil production. The company's products have more than 300 varieties and more than 1,000 specifications.
The market share of the company's products has been rising year by year, and it has now become a large-scale production enterprise integrating petrochemical equipment research and production in China. The company has always adhered to the core of user needs and manufacturing high-quality products, and has won the trust and praise of many users with excellent and attentive services. Relying on scientific research for development and continuously providing users with satisfactory high-quality products is our constant pursuit.

◆ Factory Equipment

◆ FAQ

Q.The influence of material selection of Christmas trees on production.

A.The material selection of Christmas trees is crucial to the production effect. Common materials include carbon steel, stainless steel and alloy materials. Carbon steel has a lower cost but is easily damaged in corrosive environments; stainless steel has strong corrosion resistance and is suitable for high temperature and high pressure environments, which helps to extend the service life; alloy materials provide better strength and wear resistance and are suitable for extreme conditions. Choosing the right material can improve the reliability of equipment, reduce failures and downtime, and thus improve oil production efficiency. At the same time, the choice of material will also affect the maintenance cost and the overall return on investment, so it is necessary to comprehensively consider geological conditions, fluid properties and economic factors.

Q.How to avoid damage to the wellhead device.

A.In order to avoid damage to the oil wellhead device, the following measures can be taken: First, regularly perform equipment maintenance and inspection to ensure that all components are operating normally and replace worn parts in a timely manner. Second, install a real-time monitoring system to monitor pressure and temperature changes so that operating parameters can be adjusted in a timely manner. Third, use corrosion-resistant materials to prevent environmental corrosion from affecting the equipment. Fourth, reasonably control the oil production rate to avoid equipment fatigue caused by excessive oil extraction. Finally, strengthen the training of operators, improve their professional skills, and reduce human errors. Through these measures, the service life of the wellhead device can be effectively extended to ensure safe and efficient mining.

Q.What should be paid attention to in the installation steps of the oil wellhead device?

A.The installation steps of the oil wellhead device include the following key links:
1. Site preparation: Ensure that the installation area is clean, check the stability of the ground, and perform necessary drainage and leveling.
2. Equipment inspection: Before installation, check the integrity and specifications of all components to ensure that there is no damage.
3. Foundation construction: According to the design requirements, build a suitable foundation to ensure that it can bear the weight of the equipment.
4. Step-by-step installation: According to the manufacturer's instructions, install each component step by step, such as the wellhead blowout preventer, valve, etc., to ensure that the connection is firm.
5. Sealing test: After the installation is completed, perform sealing and pressure tests to ensure that there is no leakage.
6. Debugging and inspection: After the installation is completed, debug and check whether all functions are normal.
During the installation process, attention should be paid to operational safety and ensure compliance with relevant specifications and standards.

People-oriented, honesty is gold, and customers are paramount are the founding tenets of our company. We warmly welcome and expect to receive strong support from more users. We firmly believe that technology creates brands and integrity creates brilliance. We will continue to repay the society with better products and services.